/*var a = "hello"
    +"world";*/
//var a = 'hello '+'world';
/*var a = `
<ul>
    <li>one</li>
    <li>two</li>
</ul>
`;*/
var name = "terry";
//var a = "hello "+name+" , welcome";
var a = `
hello `+name+`
welcome my house
`
a = 'hello "charles",welcome';
console.log("a:",a);
console.log("a的数据类型",typeof a);
